Process and apparatus for making a translucent medium for use in the photographic arts



F. W. HOCHSTETTER. PROCESS AND APPARATUS FOR MAKING A TRANSLUCENT MEDIUM FoR USE IN THE PHOTOGRAPHIC ARTS. APPLICATION FlLtU NOV. 13,1919.

Patented June 29, 1920.

l//l//l/l/////I/l/////k//l////l///l////////III E m I MIK a W W u E m u u H u I I n U u H I u u n u u 7 /7 z Q m UNITED 'TSTATESI PATENroFsc-a j mamen w. nocnsrn'r'rnn, or DAYTON, orno, ASSIGNOR. 'or emnin.:

- v onmma, os DAYTON, orno. v

PBOCESS AND LPPABATUS FOB i Ta all whom it mai; concm:

' compounds now Be it known that I, FnnnmoK W. HocH srm'rn, a citizen .of the United States "residing at Dayton, in the county.;of 'Kont 'gomery and. State of Ohio,

certain new; and' useful rlmgrovements, n'

Processes and Apparatusi or Making a graphic* Arts of which the following lis. a-

fspecification, reference being had therein the acoompanying drawing. 4

The principal object of my invention is to provide process and apparatusyfor making a translucent medium. for use. in the photographic arts in .the placeof nitro, cellulose generally used. By mtro' cellul'ose .compounds I. refer to thefyario'us ter whi 'hcan not ;only be used-for negatives i i only limited temporaryan'dihad to beremoved from the' r provide 1 a; 49

translucent and transpareft substances used in photographic ,and similar arts,` .many forms of which are termedfilms. ;I

' It is th furtheiobjeet-of my mi eition te provide am'edium of translucent characbutalso for transpalrencies and diapositves. k

The ran eof use ness'of my invention is is concerned, by the-limits ofthe, artitself. It is applicable tojfilm ,purposes for both stillgphotogra hyand moving pictures that the translucent. medium becomes an ntegralportion of the photographc negative or other use to which it ;maybe put,` as distinguished fromtheattempts in' the past to use translueent supports which were merely remainde g of the natiyebefore the opera:

characterli theordnar filmg which shall This is 'averymaterial advantage' over the presentfilm with ;its highly inflammable and explosiva character incuringfgreat danger in handling, shipping and use, as well asin 'the courseof manufature;

' It ismyfiob'eet .to provide. a t rans lucent have 'invented the marketg such. as. paper .of vary' acters; of varyin methodsof manu acture .ofyarying ,lengt i material; which havev omposed' thex'paper so -fag as *the* photographic art It is one o-- the objectsofmy invention,

ermanengbase 'of -translucent I thereuIting images; projections or positiv I y "Furthe'r'mor I -have succeeded in thus able .to usethe ordinary material found 'on i charand make' up its structura In aceon lishng'these several objects`{l have not a acted the rapidity withwhiclpositives ina made fromthe -negatives,nor aflecte the A further object of'my ny'ention isto so v provide" such translucent' medium that no unpleasant refraction ;would be encountered in the case of projection of moving pictures *due to ar'y;refractive. properties which mightheither beleft my translucent med n or; cr by y P o 'pr d first *subject the paper, or other mediu'n which I may employ as a base for treatment, c to a combina tion` of absolute alcohol, 4 oz., and castor'ol, 1 oz., maintained at 110 F.

p I p Patent ed June 2 9, 1920. Application neanovember s, me." sei-m m 337.325. r

such an advance in-the art that the ;result s-; not only translucent, without rain and non-combustiblabut-also:I .-have n y soy I appl' this compound to the paper at the rate o .approximately 1 ft; per second.

prefer ths rapid .rate to secure the best result. The paper thus treated is passed over "heated 'olls and then conveyed into a chamber `where the temperature' is at iF, wheretit is passed into a solution of Vasc- 'l'ineand .mineral naphtha maintained at'a temperature of 1009 F I then pass 'the .j-paerlover cold 'rollers and then, between -bufler's, in 'a th'ird chamber'm'aintained at normal temperature. y x 4 As anexample of thema'chine that I employ for this process, reference is madto he figureof the accompanying drawing.

In this figure, 1 des' ates a pipe which conveysthe combined so ution, at F, of alcohol and Castor oil, to ;a tank 2. e amount of the compound adnitted to tank' :3 is determined by `the pet cock The nnrolled from the supply roll 10 around a uide roll 11. After being treated with the rst compound, it passes over the heated rollers 12, 12, through the ide rolls13, 13

out of compartment A, whch is maintained at 110 F. temperature, into compartment B, which is maintained at 100 F. temperature. Upon passing into compartment B, the paper is conveyed over roll 14, under roll 15, through a bath 16 in the tank 17, This bath is composed of vaselineand nin-` eral 'naphtha at 100 F. temperature, as ex- `plained above. The paper is conveyed over the roll1'8, out of 'the bath 16, intojc'or'npartment C, passing between the cold rollers 19 and 20 and between the buflers 21 and 21, which reduce it to normaltemperature and give it a smooth'finish respectively. Whence the paper strip 8 passes to the roll 23, after which'it may be sensitized or treat ed as may be desired for photographic purposes; y i

and the elements of the machine for executing the process, I do not .desire to be con-' fined to the specific materials and methods and elements related, but simply state these factors as illustrative of a preferred and successful 'form of m inventioi. I do not intend to thereby limit myself, but consider withinthe purvew of 'my inventionj all the equivalents of such factors.

For instance, whileI have mentioned paper, I do not intend to confine myself to that medium alone, because my 'processis applicable to other mediums of opaque character which' it may be desired to make trans lucent. 4

Havin thus fully described my invention, what I cl aim as new and desire to secure by Letters Patent,`is: i a y 1. In combination, a tank, means for con veyin a strip of material therethrough, a'

plura ity of heated rollers, a second tank, means adjacent thereto for conveying' a stri of material'therein, cold rollers and bu ers, whereb said combination effects a change in the c aracter of said material.

2. In combination, means for supporting a roll of material, a tank, coperating means with the said tank for conve ing said material thereto, ,a plurality o i heated rollers, a second tank, means forconve ing material thereto, cold rollers, bu ers and means for supporting a roll of the finished material, whereby said combination effects a'change in the character of said material. 3. In combination, means of supporting a roll of material, a tank, means of supplyng said tank with a compound, means of conagain, a plurality of heated rollers, guide rolls, a second tank, means of conveying said material in and out of said tank, cold rollers between which said material passes,

buflers between which said material. passes and a winding reel, whereby said combination effects a change in the character of said material. i

4. In a process of making paper trans lucent, passing said paper'into a compound for that purpose, moving said paper -over heated rollers, passing said paper between 'guide rolls, all'in a temperature of 110 F.,

solution e passing said paper into a finishin in a chamber t e temperature o 100 F., passing said paper into a chamber 'of normal tem erature, moving said paper between co d rollers, rolling said paper 'and i buflinlg said paper. v

5. na process of making paper translucent, passing said paper into a terpe'.-`

ture above normal of t e surrounding air, 'creating said paper to make it translucent, passing it over'hot rollers, passing it into a chamber of lower temperature' but still p i above normal, giving it a finishing; treat- In the foreg'oing compounds and process,

ment to make it translucent, passing it' into a chamber of normal temperature, treating ture above normal o t e surrounding air,

treating said paper to make it' translueent, passing it over hot, rollers, pasing itinto--a chamber of lower temperature but still above normal, giving it a finishing treatment to'make it translueent, passingit into a chamber of normal temperature, trea'ting it with cold rollers, buflng it andwinding it on a reel. v

7. In a process of makin paper translucent, passin' it into' a chamer of approximately 110 treating it with a combinetion of absolute alcohol and castor oil, passing it over heated rollers, passing it into a temperature of approximately r F. treatin it with a'compound of vaseline' an minera naphtha f at approximately a tem perature of 100 F., passing it into 'a chamber of normal temperature, rolling it'with cold rollers and. bufiing it.

8; In a process of making paper transluc'ent, passinlg it into a chamber of approximately treating it with a'combination of absolute alcohol and castor oil at the rate of approximately 1 ft. per second, passmately 110 F., treating it with 'a combin tion of 4 oz. of absolute alcohol and 1 oz. of Castor oil at the rate of approximately 1 ft. per second, passing it over heatd rollers, pasing it into a temperature of approximately 100 F., treati it with a compound of vaselne and minera naphtha at approximately a temperature of 100 F., passing it into a chmber of normal tem ramm, rol1 i it with cold rollers and it.

n testimony wher'eof, I &fix my signa- IIDHOI W. 10431181111111. 

